The common causes of sudden decrease in blood pressure are as follows: 1. Sudden decrease in blood pressure may be caused by patients with large blood loss, severe anemia, cachectic state or frequent vomiting, diarrhea, and large amount of sweating, which can cause a drop in blood pressure due to insufficient blood volume; 2. It can also be seen in endocrine diseases, such as hypothyroidism and hypoadrenocorticism; 3. Some patients may also overdose on antihypertensive drugs, resulting in Blood pressure suddenly decreases; 4, when the patient’s condition worsens, there will also be a continuous drop in blood pressure, such as patients with advanced heart failure, patients with acute inferior wall myocardial infarction, and some patients with cerebral infarction. Low blood pressure can be taken orally with Astragalus ginseng pulse oral liquid, ginseng royal jelly oral liquid, etc. Food therapy can eat some wu chicken soup, multi-mushroom soup, etc., meat and vegetables should be reasonable, eat more food to nourish the qi and blood, warming and strengthening the spleen, such as lotus seeds, cinnamon, jujube, mulberry, etc., with the role of nourishing the heart and benefiting the blood, strengthening the spleen and brain and so on. You can also eat ginseng stewed meat, Tian Qi stewed chicken, etc., very beneficial to patients with low blood pressure.